Airbus A330 Airbus A340 - At the end of last month, Airbus sent letters to relevant airlines, suggesting that the speed measuring instruments made by French Thales Group used on the two types of passenger aircraft be replaced with similar products from American Goodrich Corporation. In most cases, an aircraft is equipped with 3 speed measuring instruments. Airbus suggests that operators replace at least 2 of them to ensure the normal operation of the speed measuring system. A spokesperson for Air France told the media that the 90 Goodrich speedometers ordered by the company arrived on the 4th, and the replacement work has begun. On the morning of the 5th, Air France replaced the speedometers on 6 aircraft, and the configuration work for other aircraft will also be completed in the near future. It was introduced that Air France owns a total of 25 A330 aircraft and 19 A340 aircraft. An Airbus A330 aircraft equipped with Thales speed measuring instrument of Air France had an accident over the Atlantic Ocean on June 1 while returning from Brazil to France, and all 228 people on board were killed. Multiple messages automatically sent before the aircraft accident showed that there were contradictions between the speed values measured by different speedometers on the aircraft. Some experts thus speculated that the failure of the aircraft speedometer caused pilots unable to obtain accurate flight speed, which then brewed the tragedy. However, the investigation report on the aircraft accident published earlier by the French Civil Aviation Safety Investigation and Analysis Bureau said that the failure of speedometer might be one of the causes of the air disaster, but it was not the only factor. Disclaimer: This article only represents the author's personal views, and is unrelated to others. The originality as well as the statements and content in the article have not been verified by this site. This site makes no guarantee or promise regarding the authenticity, integrity, and timeliness of this article and its entire or partial content and text. Readers are advised to use this article only as a reference and verify the relevant content themselves.